Warp stop-motion for looms.



No. '796,698- PATBNTED AUG. 8, 1905. W. H. BAKER.

WARP STOP MUTION FOR LOOMS.

APPLICATION FILED FEB. 15. 1904.

3 SHEETS-SHEET 1.

10.796,693, PATENTED AUO.O,1OO5.

'W. H. BAKER. O WAR? STOP MOTION FOR LOOMs.

APPLICATION PILLD FEB. 15. 1904.

3 SHEETS-SHEET 2.

WITNESSES: INVENTUH Ommmw, MW @MM @/WMQW @ha ATTORNEY mouw, i, ummm ce, Fuomumucmpnzas, vusumcmn. u c.

No. 799,693. I PATBNTED AUG. 9, 1995. W. H. BAKER.

WARP sirop MOTION POR LooMs.

APPLICATION FILED FEB. 15, 1904` 3 SHEETS-SHEET 3.

w/v' ATTORNEY detail view of the serrated plates.

UNITED STATES PATENT OFFICE.

WARP STOP-MOTION Y FOR LOOMS.

Specification of Letters Patent.

Patented Aug. 8, 1905.

Original application filed May 22, 1903, Serial No. 158,305. Divided and this application filed February 15, 1904. Serial No. 193,627.

To (all r11/1,071@ t pta/y concern:

Be it known that I, WILLIAM H. BAKER, a citizen of the United States, and a resident of Central Falls, Providence county, State of Rhode Island, have invented certain new and useful Improvements in Warp Stop-Motions for Looms, of which the following is a speciiication. l

The present invention relates to warp stop or indicating mechanism for looms, and has for its object to provide mechanical means for stopping the loom upon the breakage or undue slackening of the warp-threads or for indicat-ing such an occurrence.

The invention will be understood by reference to the accom panyingdrawings, in which- Figure 1 is a central vertical section of a loom, showing' one embodiment of my invention applied thereto; Fig. 2, a front view of a portion of the loom; Fig. 3, a sectional view on the line 3 3 of Fig. 1. Figs. 4, 5, and 6 are sectional views on the lines 4 4, 5 5, and 6 6, respectively, of Fig. 3. Fig. 7 is a horizontal section on the line 7 7 of Fig. 3. Fig. 8 is a Fig. 9 is a sectional view on the line 9 9 of Fig. 1, and

. Figs. 10 and 11 are detail views of the shipper-lever tappet. Fig. 12 is a detailed view of an indicator.

Similar reference-numerals indicate similar parts in the several views.

Referring tothe drawings, the loom-frame 1, the belt-shipper handle 2, and thelay 3 are and maybe all as common in looms. In the present example of my invention I have shown the same as applied in connection with means to stop the loom; but it will be understood that the invention may be employed in connection with any suitable indicating devices to show breakage or undue slackening of the warp-threads. The drops or detectors here- Vinafter referred to may be arranged in any desired number of groups, two groups being indicated 1n the drawings, the groups being so connected that breakage or undue slackening' of a warp-thread in either will effect the stoppage of the loom.

In order to effect the stoppage of the loom,

the shipper-lever is provided with a tappet 4, which is adapted to be impinged upon by a dagger 5 when the latter is brought into operative position (shown in dotted lines, Fig. 1) through the following instrumentalities: On a suitable shaft 6 is an eccentric 7, to which is secured a rod 8, which actuates a bell-crank lever 9, preferably made in two parts held together by a pin 36, the upper arm of which is provided with one or more sets of resilient spring forks or arms 10, adapted to embrace or engage a pin 11 on a slide-bar 12. When the detectors are divided into two banks or groups, the rock-shaft 17 of the bell-crank lever will support two sets of spring arms or forks 10 and 10, one set for each bank, as shown in Fig. 5. Fastened to the loom-frame through suitable brackets 13 are supports 14, each formed with a longitudinal groove and in the side walls of which serrations 15 are formed. The bars 12, preferably of steel or other suitable material, are slidably mounted in the grooves of the supports 14 'and also have serrations 16, Fig. 8, the said bars eX- tending a slight distance above the side walls of the supports 14. The pin 11 on the slidebar 12 projects through a slot 2O in the side Wall of the support 14, so as to be held in engagement with the spring arms or forks 10.

\ It will be obvious from the above description that as the shaft 6 is rotated the rod 8, acting through the spring arms or forks 10, will cause the serrated bars 12 to be reciprocated in the grooves'of the supports 14. n This reciprocation will continue during the normal running of the loom and will only be interrupted upon the breakage or undue slackening of a warp-thread through the means now to be described.

In practice the warp-threads will be led from the beam through the eyes of the usual heddles or harnesses and separated by lease-rods in the usual manner. The warp-threads are also led through openings 18 in the detectors 19, composed of thin strips or pieces of metal and of any usual or well-known type. The openings 18 are of sufficient length to permit the warp-threads therein to be fully opened or shed. The detectors may be made of any suitable form to embrace the support 14 or to be guided thereby when a warp-thread breaks or becomes unduly slack. As long as the detectors are maintained in normal position by the warp-threads, as shown in Figs. 4 and 8, the longitudinal reciprocatory movement of the slide-bar 12 will not be interrupted; but when a detector is released by breakage or undue slackening of a warp-thread the detector drops until arrested by falling into one of the serrations or notches 16 in the bar 12, and through the movement of said bar the detector is conducted to and allowed to fall into one of the serrations or notches 15 in the fixed 4support14, thereby arresting the longitudinal movement of the slide-bar and preventing it from traveling its full stroke. This is utilized to stop the loom or to actuate an indicator through the medium of an oscillating feeler comprising a pin 21. carried by a lever 22, mounted on a rock-shaft 23. The pin 21 may be adjustably held in the lever 22 by means of aset-screw 24 or other suitable means. The lever 22 has an extension 25, connected with a rod 26, which rod at its forward end is connected with one arm 27 of a bell-crank, the other arm of which is constituted of the dagger 5. This bell-crank is fulcruined at 28 on the lay or other moving part of the loom, so as to be carried thereby. In the present example of my invention I have shown secured to the lay-sword 29 a bracket 30, having a stoppin 31, which bears against the arm 27 of the bell-crank. A spring 32, secured at one end to the bracket 30 and at the other end to the arm 27, tends to keep said arm pressed against the pin.

The support 14 and slide-bar 12 are provided near one end with openings 33 and 34, respectively. During the normal operation of the loom and as the slide-bar 12 is reciprocated these openings at one time during each reciprocation will coincide, andthe mechanism described is so timed that upon each beat-up of the lay the rod 26 will oscillate the lever 22', causing thereby the pin 21 to pass through the openings 33 and 34, as shown in dotted lines in Fig. 6, at the time the said openings register or are coincident. 'During the beatup of the lay under normal conditions the bellcrank, bracket 30, spring 32, and rod 26 swing with the lay, andthe dagger 5 retains its normal position (shown in full lines in Fig. 1)and does not impinge upon the tappet 4. When, however, the movement of theslide-bar 12 is arrested by the descent of a detector 19 by reason of breakage or undue slackening of a warp-thread, so as to cause the detector to engage the slide-bar 12 and support 14 through their respective serrations or notches and to prevent the reciprocation of the slide-bar 12 to the full extent of its stroke, then the registration of the openings 33 and 34 will be prevented, and as the lever 22 is oscillated the pin 21 of the feeler will project into the opening 33 of the support 14 and impinge against the side of the slide-bar 12. The effect of this is to arrest the movement of rod 26; but as the lay continues its forward movement the spring 32 will be extended and the rod 26 act to rock the bell-crank, drawingthe dagger 5 into the position shown by dotted lines in Fig. 1 and causingit to impinge against the tappet4 to release the shipper-lever 2 from its notch in the holding-plate and to thereby effect the stoppage of the loom in the usual and well-known manner.

The bell-crank 9, which carries the spring forks or arms which impart movement to the slide-bar 12, may be made wide enough to receive a pair of such forks or arms for as many slide-bars as may be required for any number of warp-threads. In the drawings I have shown the arrangement for two banks or groups of warp-threads. In such case the rock-shaft 17 of the bell-crank 9 will support two spring forks or arms, the one already described, and a similar fork or arm 10', adapted to engage a pin 11', attached to a slide-bar 12 in the support 14. Likewise I provide a duplicate feeler-lever 22' and pin 21',operating in a similar manner to lever 22 and pin 21, above described. In order thatv the lever 22 may operate synchronously with lever 22, I couple'said levers together by any suitable means -as, Jfor example, by toothed quadrants or sectors 35 (shown in Fig. 6)--it being evident from such construction that any movement imparted to lever 22 will be imparted to lever 22. .Instead of toothed quadrants the levers 22 and 22 may be connected in any other manner to impart a correspondence of movement in case more than two slide-bars are used.

In case it is desired to temporarily suspend the movement of the slide-bars 12 or 12 a pin 36 is provided for normally holding together the two parts of the bell-crank 9, which, as shown, is constructed in two parts hinged together. Upon removal of the pin 36 the parts will be disconnected and no movement will be imparted to the slide-bar, said bar remaining in such position that its opening 34 will register with the opening 33 in the support 14, so as not to set in operation the stopping mechanism. A spring 36 serves to maintain the pin 36 in position.

rIhe tappet 4 is preferably fulcrumed on the shipper-lever 2 and adapted to be swung at the will of the operator out of the path of the dagger 5, as is sometimes required when starting the loom during the temporary slackening of any of the warp-threadsvor when it is required to throw the stopping or indicating mechanism out of action, a spring 38 being provided, if necessary or desired, to hold the tappet in or out of its moved position. The tappet4 instead, however, of being hinged to the shipper-lever 2 may be attached to an indicating mechanism, so that the impingement of the dagger 5 on the said tappet instead of stopping the loom will set in operation mechanism to indicate merely that a warpthread has been broken or become unduly slack, as will be readily understood. After the broken thread has been repaired or the slack thread tightened and the detector moved to its normal position the indicating mechanism may be reset by the operator.

Any suitable form of detector may be employed, and I do not confine myself to the ex- -act form shown so long as provision is made for the detector to fall on or to be carried to the full depth of the serration in both the support 14 and slide-bar 12, to thereby prevent the registration of the openings 33 and 34 and to permit ofthe movement of the dagger 5 into such position that it will impinge upon the tappet 4.

Owing to the forks or arms 1() being resilient, damage to the loom or any part thereof through the stoppage of the slide-bar 12 is prevented. T-he spring forks or arms 10 may be supported in the manner shown-that is, upon uprights 37, constituting an arm of the bell-crank 9, and secured to such uprights by screws. [t is obvious that other means might be employed to reciprocate the slidebar 12. Neither do I wish to confine myself to the exact details of construction shown and described, as I may vary the same without departing from the spirit of my invention. It is also to be understood that my invention is equally as well adapted to warping-machines and the like as it is to looms.

Instead of utilizing the movement of the dagger to stop the loom such movement may be made to set any suitable form of indicating mechanism to show that a fault has occurred, such indicating mechanism, however,

' forming no part of my invention.

In Fig. 12 I have shown the tappet 4 attached to alever or rod 40, pivoted at 4l to the breastbeam and carrying at its upper end a suitable signal or indicator disk 42.* When the dagger 5 is caused. to impinge upon the tappet 4', the indicator will be moved to the position shown in the dotted lines, thus calling the attention of the weaver to the existence of a fault. A stop 43 is provided to limit the movement of the indicator, and after the broken thread has been repaired or the slack thread tightened and the drop moved to its normal position the indicator may be returned to its original position by the Weaver.

In the foregoing description the movement of the feeler has been interrupted to actuate the stopping or indicating mechanism; but it is obvious that the dagger may be so placed as to be normally in the path of the tappet and connected with the feeler, so that during the normal operation of the loom it will be moved out of the path of the tappet, and to remain in its normal position when a warpthread breaks or becomes unduly slack. This equivalent mode of operation may be effected by so arranging the openings in the slide-bar that they will be normally closed, and thereby limit the travel of the feeler and, as hereinbefore described, cause a slight movement of the dagger to escape the tappet. In case, however, a detector should .fall the openings in the slide-bar and its support would register through the limitation of the travel of said bar, thereby allowing the feeler to enter the openings to complete its full stroke, no movement inl relation to the lay or going part of the loom taking place. The free end of the dagger would therefore impinge upony the tappet and actuate the stopping or indicating mechanism.

In the present application it is my intention to claim broadly that feature of the invention by which in one case the movement of the feeler is normally uninterrupted and when the thread breaks or becomes unduly slack is interrupted to thereby actuate the loom-stopping mechanism and in the other case by which the movement of the feeler is normally interrupted and when a warp-thread breaks or becomes unduly slack is uninterrupted to thereby actuate the loom-stopping mechanism. In both cases the feeler is made to impinge upon the bar at predetermined timesin the lirst case when a warp-thread breaks and in the second at each beat up of the layand in both the movement of the dagger is controlled by the feeler when a warp-thread breaks to set in operation the stopping or indicating mechanism. The latter construction is specifically claimed in my application, Serial No. 158,305, filed May 22, 1903, of which this application is a division.

What I claim, and desire to secure by Letters Patent, is-

1. In a warp stop-motion for looms the combination of an apertured bar, a feeler device, means to produce a relative movement between said barrand feeler so that during the normal operation of the loom the feeler shall pass into the aperture, means to arrest said movement .when a warp-thread breaks or becomes unduly slack to permit of an impingement between said bar and said feeler, and stopping or indicating means controlled by or through the feeler.

2. Ina warp stop-motion for looms the combination of an apertured bar, a feeler device and means to actuate the same, means to move said bar so that said feeler shall pass into the aperture when the loom is running normally, and means when a Warp-thread breaks or becomes unduly slack of arresting the movement of said bar to permit the feeler to impinge against said bar, and stopping or indicating means controlled by or through the feeler.

3. In a warp stop-motion for looms the combination of an apertured bar and means to reciprocate the same, detectors normally suspended above said bar and adapted to arrest the movement of said bar upon the breakage or undue slackening of a Warp-thread, a feeler adapted to normally engage the aperture of said bar, a shipper-lever and means whereby the shipper-lever is shifted to stop the loom when the movement of said bar is arrested and said feeler caused to impinge against the side of said bar.

4. In a warp stop-motion for looms the combination of an apertured bar, having its upper edge serrated or notched, a feeler device, means to produce a relative movement between said bar and feeler so that during the normal operation of the loom the feeler shall pass into the aperture, detectors supported by the warp-threads and normally held in suspension above said bar and adapted when a warp-thread breaks or becomes unduly slack of contacting with said bar to arrest said movement to prevent the entrance of the feeler into the aperture, and stopping or indicating means controlled by or through the feeler.

5. A warp stop-motion for looms comprising a serrated or notched bar, means to reciprocate said bar including a exible arm or fork, detectors adapted to arrest the movement of said bar when a Warp-thread breaks or becomes unduly slack, and a feeler coperating with said bar.

6. In a Warp stop-motion for looms the combination of an apertured bar, means to reciprocate said bar comprising a liexible or yielding connection, a feeler device adapted to enter the aperture during the normal operation of the loom, means to arrest the movement of said bar when a warp-thread breaks or becomes unduly slack to permit the feeler to impinge upon said bar, and stopping or indicating means controlled by or through the feeler.

7. A Warp stop-motion for looms comprising a serrated or notched support, .a bar carried by said support and projecting above the same, said bar having its upper edge serrated or notched, means Jfor reciprocating said bar, detectors normally suspended by the Warpthreads above said bar and support and adapted when a warp-thread breaks or becomes unduly slack of engaging said serrations to thereby arrest the movement of said bar, and a feeler cooperating with said bar.

8. In a warp stop-motion for looms the combination of an apertured bar, having serrations or notches along the upper edge thereof, a support for said bar also having serrations or notches thereon, and an aperture therein, means to reciprocate said bar, a feeler adapted to enter the apertures of said bar and support when the apertures are in register, detectors, supported by the war p-threads, above said bar and support, and adapted when a warp-thread breaks or becomes unduly slack to engage the serrations or notches in said bar and support to thereby arrest the movement ofsaid bar.

9. In a warp stop-motion forlooms the combination with an apertured bar, afeeler, means "to reciprocate said bar to permit the feeler to enter the aperture during the'normal operation of the loom, a dagger on a moving part of the loom, suitable connections between said feeler and dagger, detectors normally supported by the warp-threads and adapted to arrest the movement of said bar when a warpthread breaks or becomes unduly slack so that the feeler shall impinge upon said bar and thereby move said dagger into operative position to actuate a stopping or indicating means.

10. In a Warp stop-motion for looms the combination of a bar, a feeler device,means to produce a relative movement between said bar and feeler so that during the normal operationof the loom the said parts will not impinge one upon the other, means to arrest said movement when a warp-thread breaks or becomes'unduly slack to permit of an impingement between said bar and said feeler,

and stopping or indicating means controlled by or through the feeler.

11. A warp stop-motion for looms comprising a bar, means to reciprocate said bar including a divided bell-crank lever and a pin connecting said parts.

12. A warp stop-motion for looms comprising a serrated or notched support, a bar carried by said support and projecting above the same, said bar having its Lipper edge serrated or notched, means to produce a relative movement between said support and bar and means to arrest said movement when a warp-thread breaks or becomes unduly slack, and anormally vmoving feeler cooperating with said bar.

13. In a warp stop-motion for looms the combination of stopping or indicating mechanism, an apertured bar, a feeler device and means to actuate the same, means to normally move said bar so that said feeler shall be uninterrupted in its full movement relative to the bar, and means when a warp-thread breaks or becomes unduly slack to arrest the movement of said feeler to thereby actuate said stopping or indicating mechanism.

141. In a Warp stop-motion for looms the combination of stopping or indicating mechanism, a movable bar, a movable feeler device, means to normally prevent impingement between said bar and said feeler, and means when a warp-thread breaks or becomes unduly slack to permit impingement between said bar and feeler to thereby actuate said'stopping or indicating mechanism.

15. In a loom the combination of a bar, a feeler, means to produce a relative movement between said bar and feeler, a dagger and means connecting the same to said feeler so that the dagger will be moved thereby, a tappet adapted to be impinged upon by said dagger, means to arrest said relative movement when awarp-thread breaks or becomes unduly slack to thereby cause the dagger to impinge upon the tappet, and stopping or indicating means actuated by the movement of said tappet.

16. In a loom, the combination with loomstopping mechanism, of drop devices supported on unbroken Warp-threads, a bar, a

feeler, means to normally move both said bar and feeler so that they shall impinge one upon the other at predetermined times, the coaction of said bar and feeler actuating, when a warpthread breaks, said loom-stopping mechanism.

17. In a loom, the combination With loomstopping mechanism, of drop devices supported on unbroken warp-threads, an apertured bar, a feeler, means to produce a relative movement between said apertured bar and feeler, the coaction of said bar and feeler actuating, when a warp-thread breaks, loomstopping mechanism.

18. In a loom the combination with stopping or indicating mechanism, of drop devices supported on unbroken warp-threads, a bar, a feeler, means to normally move both said bar and feeler so that they shall impinge one upon the other at predetermined times, and a dagger the movement of which is controlled by said feeler when a warp-thread breaks or becomes unduly slack to thereby set in operation said stopping or indicating mechanism.

19. In a loom the combination with stopping or indicating mechanism, of normally supported drop devices, a dagger adapted to set in operation said stopping or indicating mechanism when a warp-thread breaks or becomes unduly slack and a drop falls, a bar, a

feeler to which said dagger is connected, means to normally move both said bar and feeler so that they shall impinge one upon the other at predetermined times, the movement of said feeler controlling the movement of said dagger to operate the stopping or indicating' mechanism when required.

20. In a loom the combination with stopping or indicating mechanism, of drop devices supported on unbroken warp-threads, a bar, a feeler, means to normally move said bar and feeler so that they shall impinge one upon the other at predetermined times, and a dagger controlled by said feeler to set in operation said stopping or indicating mechanism.

In testimony whereof` I have hereunto signed my name in the presence of two subscribing witnesses.

WILLIAM H .p BAKER. 

